Tire-valve.



M. C. SCHWEINERT & J. VOLCKHAUSEN.

TIRE VALVE.

APPLICATION FILED SEPLB. 19H.

Patented Feb. 20, 1917.

MAXIMILIAN CHARLES SCHWEINEBT, 013 'WEST HOBOKEN, AND JULIUS VOLGKHAUSEN, F WE EHAi/V KEN, NEW JERSEY.

TIREVALVE.

Specification of Letters Patent.

Application filed September 3, 1911. Serial Not 648,359.

To all whom it may concern Be it known that we, MAXIMILIAN CHARLESSCHWEINERT and Jones VoLoKHAUsEN, both citizens of the United States,residing in West Hoboken, county of Hudson, and

v State of New Jersey, and Weehawken,

therein. 7

county of Hudson, New Jersey, respectively, have invented certain newand useful Improvements in Tire-Valves, of which the following is aspecification.

This inventionrelates to tire valves and' pump tube or other inflatingtube. Air is forced through the inflating tube into the valve shell, andagainst the valve, whereby to open it. Such valves have also beenprovided with an exterior collar engaging the inflating tube and adaptedto force the same downwardly to'unseat the valve, and to raise itupwardly .to permit the valve to become seated during the act ofinflation and during running of the vehicle. Valves of this type,however, have been found toleak during the inflating operation, the airpassing through the end of the inflating tube outwardly between the tubeand the shell. It is one of the objects of the present invention toimprove this type of valve so as to prevent leakage. The invention alsoincludes certain other features which willbe hereinafter referred to.

In the drawing, which illustrates sever'al embodiments of the invention,

F'g'urel is a. diametrical section, partly in elevation of a valve ofthe type referred to showing the inflating tube raised.

Fig. 2 is a similar view showing the valve depressed and in its open,position. i

Fig-3 is atop view of the valve.

Fig. 4 is a section taken on the line in Fig. -1.

Fig. 5 is a bottom view of the lower end of the inflating tube.

Figs. 6 and 7 are modified forms i flating tube; v F1gs. 8 and 9 aremodified forms of-pack 111g for the inflating tube.

Patented nebleo, 1917.

Figs. 10,11, 12 are modifiediforiiistof valve proper. s Referring firstto Figs' 1 to aid ,iildi-i cate a valve shell having an"e n1argedi footZ) formed with a valve seat- 0. The "valve proper is usually in the formof a disk (1 v having a packing washer 6 designed town-'- tact with thevalve seat 0, and which maybe retained in place and be preventedfrom ad'hering to seat 0 by suitable means, as for instance a shoulder formed byan entering recess 0 in disk (Z and a flange c at the outer edge of thedisk. The valve proper may be provided with a recess f partly'in closinga coiled spring 9, the lower end of which may be seated upon acircularprojection it carried in a circular casing 71 which is adaptedto screw upon the valve foot, as shown. The lower wall of the casing 1sformed with a passage or passages j through which the air escapes intothe tire.

Movably'mounted within. the valve casing is an inflating tube is whichis" shown as formed in two parts screwed together,ancl the upper 'endofwhich is shown as formed with a screw thread Z on its exterior. The

upper end of the casing a isalso screwthreaded atm, the threads Z and mbeingfof reverse pitch. A screw-threadedcollar n is provided whichengages both the threads l and m, so that as the collar is rotated inone; 7 direction the inflating tube a c is ra sed or drawn away from thevalve d, while when the collar is rotated in the opposite dire'ction,the inflating tube is moved inwardly to depress the valve and hold. itin its open p0 v sition. To prevent rotation of the tube the latter maybefprovided with a groove so into which fitsa projection 0c on acasing.- Duris for the air which escapes outwardly around the valve,thelower end ofthe tube is slotted or provided with passages-o o asshown.

As the tube 70 is drawn outwardly away I from valve d in order to permitthe latter'to close during the actof inflatiomit is found that airpassing inwardly through the tube '-leaks outwardly between the tube andthe quires a heavier pressure to unseat it. Hence as the pressure isincreased the leakage around the tube is also increased.

Our invention providesa means for pre-' venting such leakage. It isusual to provide some means for limiting the upward movement of thetubek such as coacting shoulders p 11 formed upon the tube and casing.In adjusting the tube from its. lowermost position to its uppermostposition, it may occupy any one of a number of difler nt positions,unless care is taken to move it to its extreme upward limit. Our invntion in its preferred form comprises a means for preventing leakagearound the tube in any position which it may assume. To this end weprovide what is in eflect a piston packing g which may consist of thecupped leather washer shown, or any other suitable device capable ofmaking a tight joint between the parts, and at the same time permittingtheir relative movement. When the tube is is formed in two parts asshown, the piston packing may be conveniently applied. at the jointbetween the parts, being held in place by threading the parts together.Preferably a metal washer r is interposed beneath the packing as shown.The washer 9 thus described also (institutes an efficient packingbetween the s eral parts of the tube, thus preventiiig leakage at thispoint.

According to our invention it, is not necessary that the inflating tubeshall extend entirely through the bore of the valve shell to ,nthe valveproper. In Fig. 6 we have shown one form of the invention in which thevalve proper d is provided witha-rod shell.

a fixed to its upper end, which is adapted to be engaged by a short tube6 mounted at the outer end of the valve shell. The tube 6 is providedwith projections 0 0 which work in slots e 6 formed in the valve shell,while movements of the; tube are effected by a coupling sleeve fengaging screw threads upon the tube 7) and the shell. The tube isprovided at its lower 'end with a packing g which is designed to formatight joint with the wall of the bore of the valve shell as shown, sothat air cannot leak around between the tube and .the

In Fig. 7 a somewhat similar construction is shown. In this figure acoupling sleeve I1. is swiveled to a flange 2" formed on the inflatingtube j, and engages threads formed on the'upper end of the valve shell.The inflating tube carries a packing which in this instanceis shown asseating against a shoulder or seat Z formed on the shell. The-packing isheld in place by a washer m.- The washer and packing are preferablyinserted through the bottom of the valve. To this end the washer may beprovided with projections to engage a tool by which it may be rotated.

In Fig. 8 the construction of Fig. 1 is modified to the extent that arecess 0 is provided in the valve shell, which receives a packing washerp which makes a tight fit with the tube is. Under pressure the packingis crowded not only against the shoulder of the recess 0 but against thewall of the tube. The fit between the parts may be quite tight in this.construction, since the tube is moved by hand and not by air pressure.

In Fig. 9 a somewhat similar construction is adopted, except that thepacking washer g is carried upon a reduced portion of the inflating tube70' and is adapted to make contact with the conical seat 1 when the tubeis screwed upwardly. The valve proper is not necessarily limited to theconstruction illustrated in Fig. 1. It may embody other means forholding. the packing washer in place.

In Fig. 10 another means of accomplishing this result is shown. Here thevalve disk which is designated d is threaded at (Z and receives acorrespondingly threaded ring at which is screwed down upon the inneredge of washer e and holds the'inner edge thereof. The outer edge isheld by a flanged ring (Z which is threaded and sicrewed upon thethreaded periphery of the isk.

In Fig. 11 the disk 03 receives a pin J which passes through its upperpart and overlies ring (Z which it holds in place upon washer e. Theouter edge of the washer is retained by ring d the lower edge of whichis flanged over the-disk and the upper edge over the washer.

In Figs. 6, 8, 9 and 12 the footing b is illustrated as 'formed integralwith the valve shell a instead of being formed. sep arately as inFig. 1. A modified arrangement of valve is also illustrated in Fig. 12whereby the washer e is seated in an annular recess 0* on the bottom offooting 6 and against which the upturned end d ofthe disk d is seated.The washer 6 may be retained in'place if desired by flange an on thebottom of shell a.

While we have described in detail certain forms of the invention, it isunderstood that we do not wish to be limited 'to the form shown, sincevarious changes can be made therein without departing from theinvention. I

We claim as 'our invention In a tire valveor the like, thecombination-of a valve shell, avalve proper carried from said valveproper andmovable in said signed our names in the presence of two shell,and'a packlng fer making a tight subscribing wltnesses' joint betweensaid inflating tube and said MAXIMILIAN CHARLES SOHWEINERT. shell, saidtube being made in two parts JULIUS VOLCKHAUSEN.

5 and adapted to clamp said packing between Witnesses:

said parts. HENRY M. TURK,

In Witness whereof, We have hereunto THOMAS F. WALLACE.

